Your question is Stripe Billing Data Model. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Design a data model for Stripe Billing to track recurring subscriptions, upgrades, and cancellations.
Define the entities, keys, relationships, and temporal logic needed to represent subscription state, plan changes, billing periods, and cancellation timing. Explain how Stripe Billing events are ingested, deduplicated, ordered, and transformed into current-state and history tables. Include data quality checks, backfill handling, and a strategy for serving reliable subscription and churn analytics.